Sucker-rod elevator



may 5 9 E924@ A. H. NELSQN SUGKER non ELEVATOR Filed Feb. 24, 1923 mima/mi? Patented May 6, 1924.

UNITED STATES ALBERT H. NEILSON, OFTULSA, OKLAHOMA.

STICKER-ROD ELEVATOR.

Application filed February 24, 1923. Serial No. 620,989.

To all whom it may concern:

Be it known that I, ALBERT H. NnILsoN, a citizen of the United States, and a resident of T ulsa` in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Sucker- Rod' Elevators, of which the following is a specification.

My present invention relates generally to apparatus of a well known type for the withdrawalof the pump or sucker rods from oil and other wells, commonly known as an elevator, my object being the "provision of a simple, strong and inexpensive elevator capable of engagement and automaticall latching connection with a sucker' ro wherein the latch member is normally held in the inactive or receiving position by the same means which serve to lock the latch member in effective position, the means bein such as to permit of ready manipulation an release when desired.

In the accompanying drawing which illustrates ymy present invention and forms a part of this specification,

Figure 1 is a side elevation illustrating the practical application of my invention,

Figure `2 is a top plan-view of the lower section'of the elevator, showing the parts in the locked position, and

Figures 3 and 4 are cross sections taken respectively on lines 3-3 and 4--4 of Figure 2.

Referring now to these figures my invention proposes a well known type of pump or sucker rod removing device, commonly known as an elevator, the body 10 of which has means of a readily releasable nature for engagement with the sucker rod such as indicated at 11 in Figure 1 and adapted to rest in its lowered position upon a casing head as indicated at 12, this body 10 being provided with diametrically outstanding trunnions 13 with which the lower side bearings llt of the inverted U-shaped lifting yoke 15 are movably associated.

The body 10 is preferably formed of upper and lower plates or sections 16 and 17 whose inner faces are in iatwise contact, each of these plates or sections having lugs which when engaged form the trunnions 13t so that the bearings of the lifting yoke when engaged with the body 10 as in Figure 1 serve to hold the sections of the body in connection withf one another and against accidental displacement,

For the purpose of engaging the sucker rod, the two sections 16 and 17 of the body 10 have slots 18 whose inner ends extend approximately to the center of the body 10 and whose outer ends open through one side of the body between and at right angles to the trunnions 13, and the lower section 17 as indicated in Figure 1 has in addition to its sucker rod receiving slot cored-out recessesincludmg a recess 19 along one side of. its slot and a rear recess 20 beyond and communicating with the inner end ofthe slot, the recess 2O opening through one side of the body diametrically opposite the slot 18.

Within the side recess 19 a latch piece 21 is pivoted by virtue of its disposition upon an upstanding pivot pin 22so that it may swing in the said recess from the effective or latched position shown in full lines in Figure 2, to the inactive or sucker rod receiving position shown in dotted lines. This latch piece isof angular form, one arm 23 at .its inner portion being shiftable across the inner end of the slot 18 in the inactive position and its other outerl arm 24 being shiftable across the slot 18 intermediate the ends of the latter in the effective or latched position so as to confine, a sucker rod within the inner end of the slot 18. In the first mentioned position, namely the ineffective or rod receiving position, it is obvious that when the elevator is shifted so as to receive a sucker rod in its slot 18, the sucker rod upon engagement of the inner arm 23 of the latch member will swing the latch member on its pivot 22 to the active position shown in full lines in Figure 2.

Inwardly beyond its inner arm 23,'the latch member 21 has a projecting locking lug 25, and within the rear recess 20 a locking dog 26 is pivotally mounted to swing upon an upstanding pivot pin 27 and is provided with angular arms 28 and 29 the latter of which forms a locking arm and the former of which is provided with a bore 30 opposite a bore 31 of the lower body section 17, opening into the rear recess 2O so that these bores may receive the ends of a compressed coil spring 32 whose function is to control the locking dog 26 and press its inner or locking arm 29 against the inner portion of the latch piece 21.

Thus in the inactive receiving position of the latch piece 21, its lug 25 is engaged by one side of the locking arm 29 so that the latch piece is thus held in this receiving position in a yielding manner which permits it to rock upon impact of the 'sucker rod against the inner arm 23 of the latch member, to the active position shown in full lines and it is obvious that when the latch member reaches this latter position, the locking arm 29 will shift inwardly behind the lug 25 and by thus engaging the lug in endwise relation, will securely lock the latch member in effective position and continue to hold the same in this position, conning the sucker rod Within the inner end of the slot 1S until the operator grasps the outer arm 28 of the looking dog and rocks the latter to released posit-ion against the tension of spring 32.

It is obvious that in the assembled position of the parts, the upper section 16 of the body 10, Will confine both the latch member 2l and the locking dog 26 upon their pivots While detachmentJ of the upper section or plate 16 permits of ready Withdrawal of these parts and thus in addition to its operating advantages, my particular construction is especially advantageous in thus providing for quick easy repair and substitution of parts.

I claim:

1. A rod elevator of the type described which extends across the inner end of said slot yin the rod receiving position. and the other of which extends across the slot at a point spaced from the inner end of the latter in the rod late-hing position, and a spring controlled locking member pivoted in the rear recess and located entirely beyond the. inner end of the rod receiving slot, said locking member being directly engageablc with the. inner portion of the latch -member to control the latter in both its said positions.

2. A rod elevator including a body portion having a rod receiving slot opening through one side and having recesses at one side ot and inwardly beyond the Said slot, an angular `latch member pivoted in the side slot and having inner and outer arms the former of which extends across `the inner end of the Slot in the inactive position and the latter of whichextends across the slot intermediate the ends of the latter .in the active position, said latch member having a locking lug projecting inwardly1 therefrom, an angular locking dog pivoted in the inner recess and including an inner locking arm frictionally engageable at one side with the said lug in the inactive position of the latch member and movable behindthe lug and in endwise locking engagement therewith in the active position of the latch member, said locking member having an outer arm by which it may be manually shifted, vand a spring mounted in the 'body and engaging the last mentioned arm to control the locking member in its engagement with the latch ALBERT H. NEILSON.

member. 

